/in/foo.c:5:2: error: expected identifier or '(' before 'float'
  float min,
  ^~~~~
/in/foo.c:7:1: warning: no semicolon at end of struct or union
 };
 ^
/in/foo.c:8:1: error: unknown type name 'ZX'
 ZX wang(float a[],int n)
 ^~
/in/foo.c:8:1: note: use 'struct' keyword to refer to the type
/in/foo.c: In function 'wang':
/in/foo.c:12:4: error: 'struct ZX' has no member named 'min'
  zx.min=a[0];
    ^
/in/foo.c:14:17: error: expected ';' before ':' token
  for(int i=1;i<n:i++)
                 ^
/in/foo.c:18:13: error: 'struct ZX' has no member named 'min'
   if(a[i]<zx.min))
             ^
/in/foo.c:18:18: error: expected statement before ')' token
   if(a[i]<zx.min))
                  ^
/in/foo.c:19:6: error: 'struct ZX' has no member named 'min'
    zx.min=a[i];
      ^
/in/foo.c:22:4: error: 'struct ZX' has no member named 'ag'
  zx.ag=aum/n;
    ^
/in/foo.c:22:8: error: 'aum' undeclared (first use in this function)
  zx.ag=aum/n;
        ^~~
/in/foo.c:22:8: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:23:9: error: incompatible types when returning type 'struct ZX' but 'int' was expected
  return zx;
         ^~
/in/foo.c: In function 'main':
/in/foo.c:30:2: error: unknown type name 'ZX'
  ZX zx=wang(a,10);
  ^~
/in/foo.c:30:2: note: use 'struct' keyword to refer to the type
/in/foo.c:31:28: error: request for member 'max' in something not a structure or union
  printf("%.2f %.2f %.2f",zx.max,zx.min,zx.ag);
                            ^
/in/foo.c:31:35: error: request for member 'min' in something not a structure or union
  printf("%.2f %.2f %.2f",zx.max,zx.min,zx.ag);
                                   ^
/in/foo.c:31:42: error: request for member 'ag' in something not a structure or union
  printf("%.2f %.2f %.2f",zx.max,zx.min,zx.ag);
                                          ^
/in/foo.c:30:5: warning: variable 'zx' set but not used [-Wunused-but-set-variable]
  ZX zx=wang(a,10);
     ^~
/in/foo.c: In function 'wang':
/in/foo.c:24:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^